:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1c2024;
  --muted: #6b7480;
  --line: #e3e6ea;
  --accent: #f6821f;
  --accent-ink: #ffffff;
  --danger: #c9372c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; gap: 14px; align-items: center; }
.brand h1 { margin: 0; font-size: 18px; }
.logo {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 13px;
}

.token-box { display: flex; gap: 8px; flex: 0 1 340px; }
.token-box input { min-width: 0; }

.muted { color: var(--muted); font-size: 13px; }
.mt { margin-top: 20px; }

.tabs { display: flex; gap: 4px; padding: 12px 24px 0; }
.tab {
  border: 1px solid var(--line);
  border-bottom: none;
  background: #eef0f3;
  padding: 8px 18px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 14px;
}
.tab.active { background: var(--card); font-weight: 600; }

main { padding: 0 24px 48px; max-width: 980px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0 10px 10px 10px;
  padding: 18px;
  margin-bottom: 16px;
}

label { display: block; margin: 12px 0 6px; font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
input[type="file"] { width: 100%; padding: 8px; border: 1px dashed var(--line); border-radius: 8px; }
textarea { resize: vertical; }

.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 14px; }
.row.space { justify-content: space-between; align-items: center; }
.row label { margin: 0; }
.row select { width: auto; }

button { cursor: pointer; font: inherit; white-space: nowrap; }
.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 9px 20px;
  font-weight: 600;
}
.primary:disabled { opacity: 0.55; cursor: progress; }
.ghost {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 14px;
  color: var(--ink);
}
.danger { color: var(--danger); border-color: #f0cfcb; background: #fff; border-radius: 8px; padding: 6px 12px; border: 1px solid; }

h2 { font-size: 15px; margin: 0 0 8px; }

.answer { white-space: pre-wrap; word-break: break-word; }
.cite {
  display: inline-block;
  background: #fdf0e2;
  color: #a55a11;
  border-radius: 5px;
  padding: 0 5px;
  margin: 0 1px;
  font-size: 12px;
  font-weight: 600;
}

.source { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin-bottom: 10px; }
.source header { display: flex; gap: 8px; align-items: center; font-size: 13px; }
.source .num { font-weight: 700; }
.source .excerpt { margin-top: 8px; padding: 8px 10px; background: #fafbfc; border-left: 3px solid var(--accent); white-space: pre-wrap; font-size: 13px; }
.doc { display: flex; gap: 10px; align-items: center; padding: 10px 0; border-top: 1px solid var(--line); }
.doc:first-child { border-top: none; }
.doc .meta { flex: 1; min-width: 0; }
.doc .title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.hidden { display: none; }

.setup { border-left: 4px solid var(--accent); background: #fffaf4; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  max-width: 80vw;
  background: #24292f;
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 20;
}
.toast.error { background: var(--danger); }